/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.dtstack.chunjun.ddl.convent.mysql.parse;

import org.apache.calcite.sql.SqlLiteral;
import org.apache.calcite.sql.parser.SqlParserPos;

public enum SqlMysqlConstraintEnable {

    // columnOptions
    NULLABLE("NULL"),
    NOT_NULLABLE("NOT NULL"),
    VISIBLE("VISIBLE"),
    INVISIBLE("INVISIBLE"),
    AUTO_INCREMENT("AUTO_INCREMENT"),
    UNIQUE("UNIQUE"),
    PRIMARY("PRIMARY"),

    // table Options
    IGNORE("IGNORE"),
    REPLACE("REPLACE"),
    ;

    private String digest;

    SqlMysqlConstraintEnable(String digest) {
        this.digest = digest;
    }

    public String getDigest() {
        return digest;
    }

    @Override
    public String toString() {
        return digest;
    }

    /**
     * Creates a parse-tree node representing an occurrence of this keyword at a particular position
     * in the parsed text.
     */
    public SqlLiteral symbol(SqlParserPos pos) {
        return SqlLiteral.createSymbol(this, pos);
    }
}
